I've eaten beef skirt(true fajitas) for years. You need two things. A meat tenderizer both mechanical and the spice and you need to marinate them for minimum of 12 hours. Grilled and cut properly against the grain and its a fine cut of beef!

nounplural noun: fajitasa dish of Mexican origin consisting of strips of spiced beef or chicken or pork, chopped vegetables, and grated cheese, wrapped in a soft tortilla and often served with sour cream.

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